Can someone explain the end of the movie 12 monkeys to me?

I love the movie and I keep going back and forth on the meaning of one of the last scenes. Is the "Insurance salesman" at the end, who is really a doctor in the future, coming through time to get the pure virus, or is she coincidentally there and an insurance agent back then and everything happens anyway?... show more I love the movie and I keep going back and forth on the meaning of one of the last scenes. Is the "Insurance salesman" at the end, who is really a doctor in the future, coming through time to get the pure virus, or is she coincidentally there and an insurance agent back then and everything happens anyway? Did Bruce Willis complete his job?
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